Robert Hazlett, pharmaceuticals analyst at Robertson Stephens, says he uses a rule of thumb that a drug is worth four times continuing sales.

FORBES: Magazine Article

Given the general volatility of thoroughbred racing, and the fact that the horses are, by rule, 3 years old, the favorite has only managed to win four times in the last 33 years (or 12% of the time, but who's counting).

WSJ: Kentucky Derby: Identifying the Derby's Surest Losers

When Republicans use these types of rules four out of 10 times in a previous Congress and then vociferously object to the use of that rule now, I think that is -- I think that is -- again, the standard is to embrace something and then find it objectionable a pivot that requires something few figure skaters in the Olympics are able to pull off.

WHITEHOUSE: Press Briefing

Jayawardene's side successfully used the rule, which is on trial in their three-Test series against India, four times in the first match.

BBC: Jayawardene backs umpire appeals